Owensboro, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 19.7 °C (high). Annual precipitation averages 1238.5 Millimeters. Owensboro is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.5 °C | 5.6 °C | 94.23 mm |
| February | -2.1 °C | 8.2 °C | 91.19 mm |
| March | 2.4 °C | 13.6 °C | 111.76 mm |
| April | 7.9 °C | 20.2 °C | 125.22 mm |
| May | 13.8 °C | 25.3 °C | 132.08 mm |
| June | 18.6 °C | 29.8 °C | 109.98 mm |
| July | 20.4 °C | 31.3 °C | 108.2 mm |
| August | 19.1 °C | 30.9 °C | 78.49 mm |
| September | 15 °C | 27.9 °C | 90.42 mm |
| October | 8.7 °C | 21.7 °C | 90.93 mm |
| November | 2.5 °C | 13.7 °C | 96.52 mm |
| December | -1.4 °C | 7.9 °C | 109.47 mm |
| Annual | 8.5 °C | 19.7 °C | 1238.49 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |